Check idle current on PA 7 Nakamichi - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 5th July 2008, 03:09 PM   #1
diyAudio Member
Join Date: Jul 2008
Default Check idle current on PA 7 Nakamichi

Hello to every sound lovers,
i'm a new happy owner of a Nakamichi PA7. I heard that sometime idle current are increasing and can make damage. So, before bringing my amplifier to a technical station i thought that i could have an idea by measuring the amplifier consuption on the main cable.
Do you think it's a good idea and what could be the consuption of the pa7 WITH 0volt on the input ?
  Reply With Quote
Old 5th July 2008, 03:40 PM   #2
diyAudio Member
analog_sa's Avatar
Join Date: Aug 2002
Location: Cascais
Default Re: Check idle current on PA 7 Nakamichi

Originally posted by Laurent Lafran
Do you think it's a good idea
Not very good. One channel may be up, while the other is down and the total consumption is still normal. Just open it and measure the voltage drops on the emitter resistors. If it's similar to the Threshold amps you would expect around 100mA per transistor or maybe someone can provide accurate values.

Here is the relevant thread
  Reply With Quote
Old 5th July 2008, 10:35 PM   #3
The one and only
Nelson Pass's Avatar
Join Date: Mar 2001
Put your hands on the heat sinks. If you can hold them there for
10 seconds or so, then it's just right.
  Reply With Quote
Old 7th July 2008, 09:19 AM   #4
MadMutt is offline MadMutt  Australia
diyAudio Member
Join Date: Nov 2006
To suit PA7 and PA7e.
From service manual.

PS, this 100k/1000pixels limit is really starting to wee wee me off big time..........
Attached Images
File Type: gif 2.gif (94.0 KB, 294 views)
  Reply With Quote
Old 19th January 2009, 07:03 PM   #5
jiky657 is offline jiky657  Germany
diyAudio Member
Join Date: Jul 2004
Location: Germany
Would it be possible to get a copy of the PA7e service manual?
My emailaddress is
Thanks a lot!
  Reply With Quote
Old 19th January 2009, 10:23 PM   #6
diyAudio Member
Join Date: Jul 2008
Thanks to everybody.
My PA7 is now working with Rega Planar 3/RB 300 + DL103, Prťamp Naka CA5E, Ditton 66 monitor rewired and Terminator 2 cable for loudspeakers.
Any advice ?
Best regards to all,
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
What's the Idle Current of the F5 Power Amp NV&H Pass Labs 56 3rd February 2010 10:56 AM
Idle current adjustment for NAD gvelim Solid State 0 5th August 2008 03:56 AM
idle current for bryston 4B Danielll Solid State 2 3rd October 2005 05:25 PM
chip amp idle current maylar Chip Amps 2 29th December 2004 03:25 PM
SMPS Idle Current cm961 Parts 2 20th February 2004 05:56 AM

New To Site? Need Help?

All times are GMT. The time now is 11:11 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2